toss (one's) hair

Translations
потрясти (чьи-то) волосы
She likes to toss her hair when she is nervous.
Она любит потрясти свои волосы, когда нервничает.
Definitions
To quickly move or flip one's hair, often by shaking the head or using a hand, usually in a confident, flirtatious, or dismissive manner.